#include <iostream>

using namespace std;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    double v, d, s;
    char w;

    if (cin >> v >> d >> s >> w) {
        if (w == 'W') {
            v *= 0.64;
        } else if (w == 'F') {
            d *= 0.82;
        }

        double thoigian = d / v;

        if (thoigian <= s + 1e-9) {
            cout << "NAM ANH DA BI HA GUc\n";
        } else {
            cout << "NAM ANH CHUA BI Ha GUC\n";
        }
    }

    return 0;
}